Find the value of x and y. (geometry)

Ok so the value of x is 6 those lines on the 6 and x lines means that they are congruent. Then to figure out y you would use Pythagorean theorem 6^2+6^2
36+36=72
Square root 72 is about 8.5
8.5 would be y. Let me know if this is right and if this helps

Your answer would be ahere is how: perimeter is how long all the sides are. in a rectangle, there are two sets of parallel sides. so, to find this, we would to the following.(15x2)+(4x2)30+838if you have questions ask! and mark me brainliest! i really wanna level up : 3